Wiring module

ABSTRACT

An increase in the size of a wiring module is suppressed. A wiring module is for attachment to a power storage device group in which a plurality of power storage devices are arranged line up in a left-right direction. The wiring module includes: a plurality of voltage detection wires; and an insulating protector that includes a rear side routing portion in which the plurality of voltage detection wires are routed. The rear side routing portion includes a placement wall on which the plurality of voltage detection wires are placed, and a wire fixing portion that protrudes in a direction that intersects the placement wall, and to which the plurality of voltage detection wires are fixed using a binding member is provided in a region between left and right end portions of the insulating protector.

TECHNICAL FIELD

The technology disclosed in the present specification relates to awiring module.

BACKGROUND ART

The technology disclosed in JP 5462813B is known as a wiring module forattachment to a battery group in which a plurality of batteries arearranged side-by-side. This wiring module includes a plurality of busbars that connect adjacent positive and negative electrodes of theplurality of batteries, a plurality of voltage detection terminalsconnected to the bus bars, a plurality of wires connected to the voltagedetection terminals, a fixing portion that fixes the bus bars, and aninsulating plate provided with a wiring path in which the wires arefixed.

An insulating plate has a wire lead-out portion that is formed byextending the bottom wall and the side walls of the wiring path so as toprotrude from the insulating plate. A tongue piece protrudes from thebottom plate of the lead-out portion in a direction along which thebottom plate of the lead-out portion extends. A configuration isemployed in which the wires are bundled and fixed to the tongue piece bywrapping a wrapping member around the tongue piece and the wires.

JP 5462813B is an example of related art.

SUMMARY OF THE INVENTION

With the above-described configuration, the tongue piece to which thewires are fixed is formed protruding from the bottom plate of the wiringpath of the insulating plate in a direction along which the bottom plateextends. Thus, there is an issue in that the external size of the wiringmodule increases in the direction in which the wires are routed in thewiring path.

The technology disclosed in the present specification was achieved inlight of the above-described circumstances, and it is an object of thepresent invention to provide a wiring module in which an increase in thesize can be suppressed.

One aspect of the technology disclosed in the present specification is awiring module that is to be attached to a power storage device group inwhich a plurality of power storage devices are arranged side-by-side inan arrangement direction, the wiring module including: a plurality ofwires; and an insulating protector that includes a routing portion inwhich the plurality of wires are routed. The routing portion includes aplacement wall on which the plurality of wires are placed, and a wirefixing portion that protrudes in a direction that intersects theplacement wall, and to which the plurality of wires are fixed using abinding member is provided in a region between two end portions of theinsulating protector in the arrangement direction.

With the above-described configuration, the wire fixing portion to whichthe plurality of wires are fixed protrudes in a direction intersectingthe placement wall of the routing portion, and thus an increase in thesize of the insulating protector in the direction in which the pluralityof power storage devices are arranged can be suppressed.

The following embodiments are preferable as embodiments of thetechnology described in the present specification.

The routing portion includes a pair of side walls that extendintersecting the placement wall, and at least one side wall of the pairof side walls is provided with a restriction piece that protrudes towardanother one of the side walls, and restricts the plurality of wires fromcoming out of the routing portion, and the wire fixing portion isprovided in a vicinity of the restriction piece.

With the above-described configuration, when the plurality of wiresrouted along the placement wall in the routing portion are fixed to thewire fixing portion that is orthogonal to the placement wall, theplurality of wires are kept from coming out from the routing portion asa result of the plurality of wires abutting against the restrictionpiece provided in the vicinity of the wire fixing portion.

A cover is attached to the insulating protector, and the cover has adraw-out hole that extends through the cover, at a positioncorresponding to the wire fixing portion in a state where the cover isattached to the insulating protector, and an inner wall of the draw-outhole acts as a support wall that supports the plurality of wires in acase where the plurality of wires are subjected to a force acting in adirection that intersects a direction in which the wire fixing portionextends.

With the above-described configuration, the plurality of wires drawn outfrom the draw-out hole of the cover can be kept from bending sharplyunder a force acting in a direction that intersects the direction inwhich the wire fixing portion extends. Bending sharply means a statewhere a wire is bent at an angle of 90° or less. Note that the angle atwhich the wires bend may be an angle deemed to be substantially 90°without actually being 90°, and may be smaller than 91°.

With the technology disclosed in the present specification, an increasein the size of the wiring module can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a perspective view of a power storage module according toEmbodiment 1;

FIG. 2 shows a perspective view of a wiring module in a state where afront side cover and a rear side cover have been removed;

FIG. 3 shows a partially enlarged plan view of a state where voltagedetection wires are fixed to a wire fixing portion by a binding member;

FIG. 4 shows a side view of the wiring module in a state where the frontside cover and the rear side cover have been removed;

FIG. 5 shows a plan view of the wiring module;

FIG. 6 shows a partially enlarged plan view of an area within a regionmarked by a dash-dotted line in FIG. 5; and

FIG. 7 shows a cross-sectional view taken along line VII-VII in FIG. 6.

EMBODIMENTS OF THE INVENTION Embodiment 1

Embodiment 1 of the technology disclosed in the present specificationwill be described with reference to FIGS. 1 to 7. A wiring module 10according to the present embodiment constitutes a power storage module13 by being attached to a power storage device group 12, which is aplurality of power storage devices (twelve in the present embodiment) 11that are arranged side-by-side. The power storage module 13 is installedin a vehicle (not shown) such as an electric automobile or a hybridautomobile, and is used as a motive power source for driving thevehicle. In the description below, a description is given in which the Zdirection is the upward direction, the Y direction is the forwarddirection, and the X direction is the leftward direction. Also, theremay be cases where, for a plurality of the same members, a referencenumber is assigned to some of them and not assigned to the othermembers.

Power Storage Device 11

Each of the power storage devices 11 according to the present embodimentis a secondary battery. Power storage elements (not shown) are housed inthe power storage devices 11. The power storage devices 11 have asubstantially rectangular parallelepiped shape. A pair of electrodeterminals 14 are provided on the upper surface of each power storagedevice 11 at positions close to the two end portions in the front-reardirection, respectively. One electrode terminal 14 is a positiveterminal and the other is a negative terminal.

The power storage device group 12 is formed by arranging a plurality ofpairs of power storage devices 11, in which two power storage devices 11are arranged so that electrode terminals 14 with the same polarity areadjacent to each other, in the left-right direction (an example of analignment direction). The pairs of power storage devices 11 are alignedsuch that the polarities of electrode terminals 14 are different inadjacent pairs of power storage devices 11. For example, in one pair ofpower storage devices 11, if the positive electrodes are arranged on thefront side and the negative electrodes are arranged on the rear side, inanother pair of power storage devices 11 adjacent to the said pair ofpower storage devices 11, the negative electrodes are arranged on thefront side and the positive electrodes are arranged on the rear side.

A pair of end plates 47 are arranged on the left and right end portionsof the power storage device group 12. The pair of end plates 47 are heldbetween a pair of sandwiching plates 48 that are fixed to the front andrear side surfaces of the power storage device group 12 using bolts 49.

Wiring Module 10

As shown in FIG. 1, the wiring module 10 is attached to the uppersurface of the power storage device group 12. Overall, the wiring module10 is elongated in the left-right direction.

As shown in FIG. 2, the wiring module 10 includes an insulatingprotector 15 and a plurality of voltage detection wires 16 (examples ofa wire) routed in the insulating protector 15.

Insulating Protector 15

The insulating protector 15 is made of a synthetic resin with insulatingproperties. The insulating protector 15 includes connection bus bars 17that electrically connect adjacent pairs of power storage devices 11,and output bus bars 18 that are arranged on the left and right endportions of the power storage device group 12 and electrically connectthe power storage device group 12 and an external circuit to each other.

At positions near the rear end portion of the insulating protector 15, aplurality (three in the present embodiment) of connection bus barhousing portions 19 are provided, into which a plurality (three in thepresent embodiment) of connection bus bars 17 are respectively housed.The connection bus bar housing portions 19 have a substantiallyrectangular shape elongated in the left-right direction when seen fromabove, and are formed to be slightly larger than the connection bus bars17. The connection bus bar housing portions 19 have a box shape and areopen upward.

At positions near the front end portion of the insulating protector 15,a plurality (two in the present embodiment) of connection bus barhousing portions 19 are provided, into which a plurality (two in thepresent embodiment) of connection bus bars 17 are respectively housed.Output bus bar housing portions 20 that house the output bus bars 18 areprovided at positions that are near the front end portion and are on theleft and right end portions of the insulating protector 15,respectively. The output bus bar housing portions 20 have asubstantially rectangular shape elongated in the left-right directionwhen seen from above, and are formed to be slightly larger than theoutput bus bars 18. The output bus bar housing portions 20 have a boxshape and are open upward.

Linking portions 21 that have a plate shape extending in the front-reardirection link the plurality of connection bus bar housing portions 19provided at positions near the rear end portion of the insulatingprotector 15 to the plurality of connection bus bar housing portions 19and the plurality of output bus bar housing portions 20 provided atpositions near the front end portion of the insulating protector 15.

As shown in FIG. 3, in each connection bus bar housing portion 19, aconnection bus bar 17 is housed in a state overlapped by a voltagedetection terminal 22. Also, in each output bus bar housing portion 20,an output bus bar 18 is housed in a state overlapped by a voltagedetection terminal 22.

Connection Bus Bar 17

As shown in FIG. 2, the connection bus bars 17 are formed by pressing ametal plate into a predetermined shape. As the material of the metalplate, copper, a copper alloy, iron, an iron alloy, aluminum, analuminum alloy, or the like can be appropriately selected as needed. Theconnection bus bars 17 have an elongated shape in the left-rightdirection when seen from above. Each of the connection bus bars 17 isprovided with a plurality (four in the present embodiment) ofthrough-holes 23A that extend through the connection bus bars 17 andthrough which bolts (not shown) are passed. In a state where bolts arepassed through the through-holes 23A, the electrode terminals 14 and theconnection bus bars 17 are electrically connected to each other byscrewing the bolts to screw holes formed in the electrode terminals 14.

Output Bus Bar 18

As shown in FIG. 2, in each of the output bus bars 18, a plurality (twoin the present embodiment) of through-holes 23B, through which bolts(not shown) are to be passed, are formed extending through the outputbus bar 18. At one end portion of each output bus bar 18, a barrelportion 25 is provided to which a wire 24, which is for electricallyconnecting an external circuit and the power storage device group 12 toeach other, is connected. The wire 24 and the output bus bar 18 areelectrically connected to each other by crimping the barrel portion 25to the outer circumferential surface of the wire 24. The wire 24connected to the output bus bar 18 disposed at the left end portion ofthe insulating protector 15 is drawn out to the left from the insulatingprotector 15. Also, the wire 24 connected to the output bus bar 18disposed at the right end portion of the insulating protector 15 isdrawn out to the right from the insulating protector 15. Theconfiguration of the output bus bars 18 is otherwise the same as that ofthe above-described connection bus bars 17, and thus a redundantdescription is omitted.

Voltage Detection Terminal 22

As shown in FIG. 3, the voltage detection terminals 22 are formed bypressing a metal plate into a predetermined shape. As the material ofthe metal plate, copper, a copper alloy, iron, an iron alloy, aluminum,an aluminum alloy, or the like can be appropriately selected as needed.The voltage detection terminals 22 each include an electrode connectionportion 26 that has a plate shape, and a barrel portion 27 extendingfrom the electrode connection portion 26.

The electrode connection portion 26 is provided with a through-hole 23Cthrough which a bolt is to be passed. The electrode connection portion26 is sandwiched between the head of a bolt and the connection bus bar17 or the output bus bar 18, and as a result, the voltage detectionterminal 22 and the electrode terminal 14 are electrically connected toeach other.

The barrel portion 27 is crimped to one end portion of a voltagedetection wire 16 (an example of a wire). The other end portion of thevoltage detection wire 16 is connected to an external connection device(not shown) such as an ECU (Electronic Control Unit).

Note that the ECU is equipped with a micro computer, elements, and thelike, and employs a known configuration equipped with the functions ofdetecting the voltage, current, temperature, and the like of the powerstorage devices 11, and controlling charging, discharging, and the likeof each of the power storage devices 11.

Front Side Routing Portion 28

As shown in FIG. 2, a front side routing portion 28 (an example of arouting portion) elongated in the left-right direction is providedrearward of the connection bus bar housing portions 19 and the outputbus bar housing portions 20 that are provided at positions close to thefront end portion of the insulating protector 15. The front side routingportion 28 is formed into a groove shape and includes a placement wall29 onto which a plurality of voltage detection wires 16 are placed, anda pair of side walls 30 formed standing upright from the side edges ofthe placement wall 29. The placement wall 29 is elongated in theleft-right direction.

At least one side wall 30 in the pair of side walls 30 is provided withrestriction pieces 31 that protrude toward the other side wall 30. A gaplarge enough for a detection wire 16 to be passed through is providedbetween the leading end portions of the restriction pieces 31 and theother side wall 30. The voltage detection wires 16 are arranged in thefront side routing portion 28 through this gap, and the voltagedetection wires 16 are restricted from coming out of the front siderouting portion 28 through this gap.

Rear Side Routing Portion 32

A rear side routing portion 32 (an example of a routing portion)extending in the left-right direction is provided forward of theconnection bus bar housing portions 19 that are provided at positionsnear the rear end portion of the insulating protector 15. The rear siderouting portion 32 is formed into a groove shape and includes aplacement wall 29 onto which a plurality of voltage detection wires 16are placed, and a pair of side walls 30 formed standing upright from theside edges of the placement wall 29. Restriction pieces 31 are providedon one of the pair of side walls 30. Apart from that described above,the configuration is similar to that of the front side routing portion28 described above, and thus a redundant description is omitted.

Linking Routing Portion 33

The two end portions of the front side routing portion 28 and the twoend portions of the rear side routing portion 32 are linked respectivelyto each other via linking routing portions 33 (an example of a routingportion) that extend in the front-rear direction. The linking routingportions 33 are each formed into a groove shape and include a placementwall 29 onto which a plurality of voltage detection wires 16 are placed,and a pair of side walls 30 formed standing upright from the side edgesof the placement wall 29. The placement walls 29 are elongated extendingin the front-back direction. The front side routing portion 28 and therear side routing portion 32 are in communication with each other viathe linking routing portions 33. Restriction pieces 31 are provided onone side wall 30 of each pair of side walls 30. Apart from thedescription above, the configuration is similar to that of the frontside routing portion 28 described above, and a redundant description isomitted.

Wire Fixing Portion 34

As shown in FIG. 7, in the region between the left and right endportions of the insulating protector 15, the rear side routing portion32 is provided with a wire fixing portion 34 that protrudes in adirection that intersects the placement wall 29. In the presentembodiment, the wire fixing portion 34 protrudes in a direction that isa direction away (upward) from the power storage device group 12 and isorthogonal to the placement wall 29. Note that, in the presentspecification, “orthogonal” refers to the angle formed by the wirefixing portion 34 and the placement wall 29 being in a range of 85° to95°. The wire fixing portion 34 has a plate shape extending in theup-down direction. As shown in FIG. 3, the wire fixing portion 34 isformed extending upward from a rear end portion of an extension wall 35that extends rearward from a region between the upper and lower endportions of the side wall 30 on the front side of the rear side routingportion 32. As shown in FIG. 4, the upper end portion of the wire fixingportion 34 extends to a position higher than the upper end portion ofthe side walls 30 of the rear side routing portion 32. The strength ofthe wire fixing portion 34 is increased by a reinforcement wall 36 thatextends upward from the upper surface of the extension wall 35 and isconnected to the front surface of the wire fixing portion 34. The upperend portion of the wire fixing portion 34 is provided with a pair ofprotruding portions 37 that protrude in the left and right directions.

In a state where the voltage detection wires 16 routed in the rear siderouting portion 32 are bent upwards, a binding member 38 is wrappedaround the voltage detection wires 16 and the wire fixing portion 34,thus fixing them to the wire fixing portion 34. The binding member 38 iswrapped at a position lower than the protruding portions 37 of the wirefixing portion 34, and thus the binding member 38 is kept from comingoff upwards by the protruding portions 37. The binding member 38 is acommonly known member that includes a band portion 39 that can be woundaround the wire fixing portion 34 and the voltage detection wires 16,and a fixing portion 40 that fixes this band portion 39.

The wire fixing portion 34 is provided in the rear side routing portion32, at a position that is between two restriction pieces 31 arrangedside-by-side and spaced apart from each other in the left-rightdirection, and is in the vicinity of restriction pieces 31. The wirefixing portion 34 is provided at the center position in the left-rightdirection between two restriction pieces 31.

Front Side Cover 41

As shown in FIG. 5, a front side cover 41 that covers the connection busbar housing portions 19, the output bus bar housing portions 20, and thefront side routing portion 28, is attached to the insulating protector15 from above at a position near the front end portion thereof. Thefront side cover 41 is made from a synthetic resin with insulatingproperties, and is elongated in the left-right direction. The front sidecover 41 is attached to the insulating protector 15, and as a result,the connection bus bars 17 housed in the connection bus bar housingportions 19 and the output bus bars 18 housed in the output bus barhousing portions 20 are electrically insulated.

As shown in FIG. 1, a configuration is employed in which the front sidecover 41 and the insulating protector 15 are integrally attached whenlocking portions 42 provided on the front side cover 41 elastically lockwith lock receiving portions 43 provided at positions corresponding tothe locking portions 42 of the insulating protector 15.

Rear Side Cover 44

As shown in FIG. 5, a rear side cover 44 (example of a cover) thatcovers the connection bus bar housing portions 19 and the rear siderouting portion 32 is attached to the insulating protector 15 from aboveat a position near the rear end portion thereof. The rear side cover 44is made of a synthetic resin with insulating properties, and iselongated in the left-right direction. The rear side cover 44 isattached to the insulating protector 15, and as a result, the connectionbus bars 17 housed in the connection bus bar housing portions 19 areelectrically insulated.

As shown in FIG. 1, a configuration is employed in which the rear sidecover 44 and the insulating protector 15 are integrally attached whenlocking portions 42 provided on the rear side cover 44 elastically lockwith lock receiving portions 43 provided at positions corresponding tothe locking portions 42 of the insulating protector 15.

As shown in FIG. 6, a draw-out hole 45 that extends through the rearside cover 44 is provided at a position corresponding to the wire fixingportion 34 in a state where the rear side cover 44 is attached to theinsulating protector 15. The draw-out hole 45 is formed in asubstantially rectangular shape as seen from above. The rear siderouting portion 32 is exposed through this draw-out hole 45.

Also, the wire fixing portion 34 protrudes upward from the draw-out hole45. The height position of the upper end portion of the wire fixingportion 34 is set somewhat higher than the upper surface of the rearside cover 44.

The voltage detection wires 16 drawn out from the draw-out hole 45 arebent rearward at a position above the draw-out hole 45, and extendrearward.

As shown in FIG. 7, the hole-edge portion of the draw-out hole 45 isdesigned as a support wall 46 that extends in the up-down direction.When the voltage detection wires 16 fixed to the wire fixing portion 34are subjected to a force acting in a direction that intersects thedirection in which the wire fixing portion 34 extends, the voltagedetecting wires 16 abut against the support wall 46 and are supported bythe support wall 46. In other words, the support wall 46 supports thevoltage detection wires 16 in the front-rear direction or the left-rightdirection when a force is applied to the voltage direction wires 16 inthe front-rear direction or the left-right direction.

Effects and Actions of the Embodiment

Next, effects and actions of the present embodiment will be described.The present embodiment is a wiring module 10 that is to be attached to apower storage device group 12 in which a plurality of power storagedevices 11 are arranged side-by-side in the left-right direction, andincludes a plurality of voltage detection wires 16, and an insulatingprotector 15 that has a rear side routing portion 32 in which theplurality of voltage detection wires 16 are routed. The rear siderouting portion 32 includes a placement wall 29 on which the pluralityof voltage detection wires 16 are placed, and a wire fixing portion 34that protrudes in a direction that intersects the placement wall 29, andto which the voltage detection wires 16 are fixed using a binding member38, is provided in the region between the left and right end portions ofthe insulating protector 15.

With the above-described configuration, the wire fixing portion 34 towhich the voltage detection wires 16 are fixed protrudes in a directionthat intersects the placement wall 29 of the rear side routing portion32, and thus an increase in the size of the insulating protector 15 inthe direction in which the plurality of power storage devices 11 arearranged can be suppressed.

Note that in the present embodiment, the wire fixing portion 34 and theplacement wall 29 are orthogonal to each other. In the presentspecification, “orthogonal” means that the angle of the placement wall29 relative to the extension direction of the wire fixing portion 34 isin a range of 85° to 95°.

Also, according to the present embodiment, the rear side routing portion32 has a pair of side walls 30 that extend intersecting the placementwall 29, at least one side wall 30 of the pair of side walls 30 isprovided with a restriction piece 31 that protrudes toward the otherside wall 30 and restricts the plurality of voltage detection wires 16from coming out of the rear side routing portion 32, and the wire fixingportion 34 is provided in the vicinity of the restriction piece 31.

With the above-described configuration, when the plurality of voltagedetection wires 16 are routed along the placement wall 29 in the rearside routing portion 32 and fixed to the wire fixing portion 34 that isorthogonal to the placement wall 29, the plurality of voltage detectionwires 16 are kept from coming out of the rear side routing portion 32due to the plurality of voltage detection wires 16 abutting against therestriction piece 31 provided in the vicinity of the wire fixing portion34.

Also, according to the present embodiment, the rear side cover 44 thatcovers the rear side routing portion 32 is configured to be attached tothe rear end portion of the insulating protector 15, and the rear sidecover 44 includes a draw-out hole 45 that extends through the rear sidecover 44, at a position that corresponds to the wire fixing portion 34in a state where it is attached to the insulating protector 15. Theinner wall of the draw-out hole 45 acts as a support wall 46 thatsupports the plurality of voltage detection wires 16 in a case where theplurality of voltage detection wires 16 are subjected to a force actingin a direction that intersects the direction in which the wire fixingportion 34 extends.

With the above-described configuration, the plurality of voltagedetection wires 16 drawn out from the draw-out hole 45 of the rear sidecover 44 can be kept from bending sharply under a force acting in adirection that intersects the direction in which the wire fixing portion34 extends. “Bending sharply” means wires bending at an angle of 90° orless. Note that the angle at which the voltage detection wires 16 bendmay be an angle deemed to be substantially 90° without actually being90°, and may be smaller than 91°.

OTHER EMBODIMENTS

The present invention is not limited to the embodiment described in theabove description with reference to the drawings, and embodiments suchas the following also fall within the technical scope of the presentinvention, for example.

(1) In the present embodiment, a configuration was employed in which onewire fixing portion 34 is formed in one wiring module 10, but there isno limitation to this, and a configuration may be employed in which aplurality of wire fixing portions 34 are formed in one wiring module 10.

(2) In the present embodiment, a configuration was employed in which thewire fixing portion 34 is provided in the rear side routing portion 32,but there is no limitation to this. The wire fixing portion 34 may beprovided in the front side routing portion 28 or the linking routingportion 33, and can be provided at any position in the insulatingprotector 15 as needed.

(3) In the present embodiment, the wires are described as being thevoltage detection wires 16 that detect the voltage of the power storagedevices 11, but there is no limitation to this. The wires may be wiresthat detect the temperature of the power storage devices 11. Also, theplurality of wires do not necessarily have to be connected to the powerstorage devices 11, and, for example, a plurality of wires connected toa device different to the power storage module 13 may be routed in thewiring module 10.

(4) The power storage device 11 can be a capacitor or a condenser.

(5) In the present embodiment, a configuration is employed in which arestriction piece protrudes from one side wall toward another side wall,but there is no limitation to this. A configuration may be employed inwhich a pair of restriction pieces are respectively provided on a pairof side walls and each protrude toward the opposing side wall, and a gapthrough which the wires can be passed is provided between the leadingend portions of the pair of restriction pieces.

(6) Either one or both of the front side cover 41 and the rear sidecover 44 may be omitted.

(7) The wire fixing portion 34 may be formed protruding upward from theplacement wall 29.

(8) Adhesive tape may also be used as the binding member 38.

(9) In the present embodiment, the draw-out hole 45 has a substantiallyrectangular shape when seen from above, but there is no limitation tothis. The draw-out hole 45 may have any shape such as a circular shape,an oval shape, a race track shape, a triangular shape, and a polygonalshape, as needed.

(10) In the present embodiment, the angle formed between the wire fixingportion 34 and the placement wall 29 is 85° to 95°, but there is nolimitation to this. For example, the angle may be 45° obliquely upwardrelative to the placement wall 29, or set to any angle.

LIST OF REFERENCE NUMERALS

-   -   10: Wiring module    -   11: Power storage device    -   12: Power storage device group    -   15: Insulating protector    -   16: Voltage detection wire    -   29: Placement wall    -   30: Side wall    -   31: Restriction piece    -   32: Rear side routing portion    -   34: Wire fixing portion    -   38: Binding member    -   44: Rear side cover    -   45: Draw-out hole    -   46: Support wall

What is claimed is:
 1. A wiring module configured to be attached to a power storage device group in which a plurality of power storage devices are arranged side-by-side in an arrangement direction, the wiring module comprising: a plurality of wires; and an insulating protector that includes a routing portion in which the plurality of wires are routed, wherein the routing portion includes a placement wall on which the plurality of wires are placed, and a wire fixing portion to which the plurality of wires are fixed using a binding member protrudes in a direction that intersects the placement wall, in a region between two end portions of the insulating protector in the arrangement direction.
 2. The wiring module according to claim 1, wherein the routing portion includes a pair of side walls that extend intersecting the placement wall, and at least one side wall of the pair of side walls includes a restriction piece that protrudes toward another one of the side walls, and restricts the plurality of wires from coming out of the routing portion, and the wire fixing portion is provided in a vicinity of the restriction piece.
 3. The wiring module according to claim 1, wherein a cover is attached to the insulating protector, the cover has a draw-out hole that extends through the cover, at a position corresponding to the wire fixing portion in a condition in which the cover is attached to the insulating protector, and an inner wall of the draw-out hole acts as a support wall that supports the plurality of wires in a condition in which the plurality of wires are subjected to a force acting in a direction that intersects a direction in which the wire fixing portion extends. 